In older adults, which mechanism is impaired and increases the risk of dehydration?

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Enhance your geriatric care skills with our HESI Gerontology Test. Learn about age-related risks with multiple choice questions, hints, and detailed explanations to boost your exam readiness!

Multiple Choice

In older adults, which mechanism is impaired and increases the risk of dehydration?

Explanation:
Impaired thirst mechanism is the factor that increases dehydration risk in older adults. As people age, the hypothalamic sensors that trigger thirst become less responsive, and the drive to drink diminishes. This means fluids aren’t taken in even when the body needs them, leading to dehydration. The other options don’t fit: increased thirst would help prevent dehydration; enhanced renal function is not typical with aging and wouldn’t explain greater dehydration risk; increased skin hydration would actually reduce dehydration.

Impaired thirst mechanism is the factor that increases dehydration risk in older adults. As people age, the hypothalamic sensors that trigger thirst become less responsive, and the drive to drink diminishes. This means fluids aren’t taken in even when the body needs them, leading to dehydration. The other options don’t fit: increased thirst would help prevent dehydration; enhanced renal function is not typical with aging and wouldn’t explain greater dehydration risk; increased skin hydration would actually reduce dehydration.

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